Actor Charlton ____ (6)
I believe the answer is:
heston
'actor charlton' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for heston that I've seen before include "Charlton __, actor - __ Blumenthal, chef" , "Service Area on M4" , "US star" , "__ Blumenthal, celebrity chef" .)